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Tutorial ID | Title | Tutorial | Video Tutorial | Revision Notes | Revision Questions | |
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5.4 | Elastic Potential Energy and Combination of Springs |
1. A 2 kg object falls from 8 m above the ground on a spring placed vertically and as a result, it compresses the spring by 4 cm. What is the value of spring constant? For simplicity, take g = 10 N/kg.
Correct Answer: A
2. A 2 kg object starts sliding from rest down a frictionless slope of maximum height 4 m and when it reaches the bottom, it continues sliding for other 5 m along a horizontal plane by friction coefficient 0.3. Then, the object compresses a spring with constant 2000 N/m. Calculate the spring compression in cm. For simplicity, take g = 10 N/kg.
Correct Answer: B
3. Two springs by constants 60 N/m and 300 N/m are first combined in parallel, then in series as shown in the figure.
What is the ratio kp / ks for the two total spring constants obtained in these combinations?
Correct Answer: D
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